CN1065578C - Pulp bleaching - Google Patents
Pulp bleaching Download PDFInfo
- Publication number
- CN1065578C CN1065578C CN95194782A CN95194782A CN1065578C CN 1065578 C CN1065578 C CN 1065578C CN 95194782 A CN95194782 A CN 95194782A CN 95194782 A CN95194782 A CN 95194782A CN 1065578 C CN1065578 C CN 1065578C
- Authority
- CN
- China
- Prior art keywords
- chlorine dioxide
- stage
- bleaching
- slurry
- chelating agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004076 pulp bleaching Methods 0.000 title 1
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000004155 Chlorine dioxide Substances 0.000 claims abstract description 14
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 14
- 235000019398 chlorine dioxide Nutrition 0.000 claims abstract description 14
- 238000004061 bleaching Methods 0.000 claims abstract description 13
- 239000002738 chelating agent Substances 0.000 claims abstract description 9
- 238000005406 washing Methods 0.000 claims abstract description 7
- 229910021645 metal ion Inorganic materials 0.000 claims abstract description 5
- 239000002002 slurry Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 6
- 239000007844 bleaching agent Substances 0.000 claims description 4
- WAEMQWOKJMHJLA-UHFFFAOYSA-N Manganese(2+) Chemical compound [Mn+2] WAEMQWOKJMHJLA-UHFFFAOYSA-N 0.000 claims description 2
- 229910001437 manganese ion Inorganic materials 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 229960002163 hydrogen peroxide Drugs 0.000 abstract 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 abstract 1
- 229920001131 Pulp (paper) Polymers 0.000 abstract 1
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- 239000011572 manganese Substances 0.000 abstract 1
- 150000002978 peroxides Chemical class 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- MAYPHUUCLRDEAZ-UHFFFAOYSA-N chlorine peroxide Inorganic materials ClOOCl MAYPHUUCLRDEAZ-UHFFFAOYSA-N 0.000 description 1
- 239000012978 lignocellulosic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1026—Other features in bleaching processes
- D21C9/1042—Use of chelating agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
- D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
- D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Detergent Compositions (AREA)
- Coloring Foods And Improving Nutritive Qualities (AREA)
- Medicinal Preparation (AREA)
- Coils Or Transformers For Communication (AREA)
- Semiconductor Lasers (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Abstract
Bleaching of chemical pulp in several steps comprising final bleaching with chlorine dioxide and, respectively, hydrogenperoxide. The pulp is treated directly in connection to the chlorine dioxide step (3) without intermediate washing with chelating agent (2) for the elimination of metal ions, preferably manganese. The pulp is thereafter washed (4) and bleached with hydrogenperoxide (5).
Description
The present invention relates to bleaching with chemical sizwe form lignocellulosic material.More particularly, the present invention relates to last bleaching to slurry by adopting chlorine dioxide and hydrogen peroxide to carry out as bleaching agent.
In order to carry out peroxide bleaching effectively, slurry must be removed particularly manganese ion of metal ion haply.Metal ion comes out as a result of this stage condition is dissolved in chlorine dioxide stage usually, is removed in the washing stage thereafter then, after this can carry out peroxide bleaching to slurry.This in most of the cases is enough to expend volume production with rational peroxide and gives birth to gratifying ISO lightness.
Have now found that, might further reduce the metal ion content in the slurry, thereby reduce the peroxide amount of expending and/or increase the ISO lightness.According to the present invention, this is by adopting the processing that chelating agent carries out with chlorine dioxide stage directly links to each other to realize to slurry.
Characteristics of the present invention can be apparent from claims.
Accompanying drawing below with reference to two embodiment of the present invention specifically describes the present invention.
Fig. 1 and 2 represents two examples of layout figure of the present invention.
Bleaching process comprises some bleaching stages, and wherein last bleaching is that separately the stage carries out for by chlorine dioxide and peroxide two.
In the embodiment in figure 1, slurry is at first being handled (the Q stage) 2 by chelating agent after a washing stage 1 in advance, by chlorine dioxide treatment (D stage), add this two kinds of chemicalss successively in these two stages then.After the D stage 3, slurry was washed in the washing stage 4, and bleach (the P stage) 5 by hydrogen peroxide, wash once more in the washing stage 6 then.According to another embodiment of Fig. 2, D in the stage chlorine dioxide feed in raw material on order prior to the chelating agent in the Q stage 2.In other respects, all the embodiment with Fig. 1 is suitable for this embodiment.
Therefore, importantly, carry out chlorine dioxide and chelating agent successively reinforced promptly be not to add together simultaneously but directly link to each other, do not carry out any washing therebetween.Found that chelating agent will produce ill effect with chlorine dioxide, adding then can produce aforementioned effect successively.Therefore, the present invention comprises a kind of improved bleaching process, and wherein bleaching agent, especially hydrogen peroxide can more effectively be used.
Q stage and the condition of D in the stage can be standards.This comprises the stage for Q: the slurry enrichment factor is 1-20%, is preferably 8-15%; Temperature is 45-100 ℃, is preferably 70-90 ℃; The pH value is 1.5-8, is preferably 2-4; Time is 10-120 minute, is preferably 10-60 minute.To subsequently P stage also can with other add or not in addition the traditional approach of oxygen carry out.But as mentioned above,, can reduce the reinforced or increase ISO lightness of peroxide as a result according to process of the present invention.So in fact, make peroxide obtain more efficient use.
Certainly, the present invention has more than and is limited to described embodiment, and can change in design scope of the present invention.
Claims (3)
1. method with some stage bleaching chemical sizwes, comprise the last bleaching of adopting chlorine dioxide and hydrogen peroxide respectively, it is characterized in that, for institute/stating slurry employing chelating agent (2) carries out directly linking to each other with chlorine dioxide stage (3) and not having middle processing 10-120 minute of washing, to eliminate especially manganese ion of metal ion, then described slurry is washed (4) and adopts hydrogen peroxide to bleach (5).
2. the method for claim 1 is characterized in that, directly adopts chelating agent (2) that described slurry is handled before in described chlorine dioxide stage (3).
3. the method for claim 1 is characterized in that, directly adopts chelating agent (2) that described slurry is handled afterwards in described chlorine dioxide stage (3).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9402885A SE514697C2 (en) | 1994-08-31 | 1994-08-31 | Elimination of metal ions in pulp bleaching |
| SE94028859 | 1994-08-31 | ||
| SE9402885-9 | 1994-08-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1157644A CN1157644A (en) | 1997-08-20 |
| CN1065578C true CN1065578C (en) | 2001-05-09 |
Family
ID=20395066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95194782A Expired - Fee Related CN1065578C (en) | 1994-08-31 | 1995-08-11 | Pulp bleaching |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US6540872B1 (en) |
| EP (1) | EP0778909B1 (en) |
| JP (1) | JPH10505639A (en) |
| CN (1) | CN1065578C (en) |
| AT (1) | ATE226658T1 (en) |
| AU (1) | AU687626B2 (en) |
| BR (1) | BR9508653A (en) |
| CA (1) | CA2197771A1 (en) |
| DE (1) | DE69528660T2 (en) |
| ES (1) | ES2185715T3 (en) |
| FI (1) | FI970821A0 (en) |
| NO (1) | NO970907D0 (en) |
| NZ (1) | NZ292288A (en) |
| PT (1) | PT778909E (en) |
| SE (1) | SE514697C2 (en) |
| WO (1) | WO1996006976A1 (en) |
| ZA (1) | ZA957070B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6375797B1 (en) * | 1996-06-20 | 2002-04-23 | Andritz-Ahlstrom Oy | Bleaching chemical pulp in a PkDQ-Po Sequence |
| SE507742C2 (en) * | 1996-11-08 | 1998-07-06 | Sunds Defibrator Ind Ab | Bleaching of pulp with chlorine dioxide, alkali and complexing agents without intermediate washes |
| SE0200981D0 (en) * | 2002-03-28 | 2002-03-28 | Eka Chemicals Ab | Process for bleaching lignocellulose-containing non-wood pulp |
| JP4513959B2 (en) * | 2004-09-17 | 2010-07-28 | 三菱瓦斯化学株式会社 | Semi-bleaching bleaching process for chemical pulp for papermaking |
| FI123102B (en) | 2006-03-31 | 2012-11-15 | Laennen Tutkimus Western Res Inc Oy | Chemical pulp bleaching process |
| PT2288752E (en) | 2008-06-20 | 2014-05-07 | Int Paper Co | Composition and recording sheet with improved optical properties |
| CN101812812B (en) * | 2009-02-25 | 2012-08-08 | 山东福荫造纸环保科技有限公司 | Elemental chlorine free bleaching method for plant fiber stuff |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2219504B1 (en) * | 1972-04-21 | 1974-02-28 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt | MULTI-STAGE BLEACHING OF PULP WITH SIGNIFICANTLY REDUCED CHLORINE USE |
| WO1991011554A1 (en) * | 1990-01-31 | 1991-08-08 | Eka Nobel Ab | Process for bleaching of ligno-cellulosic material |
| US5091054A (en) * | 1989-08-18 | 1992-02-25 | Degussa Corporation | Process for bleaching and delignification of lignocellulosic |
| WO1993014262A1 (en) * | 1992-01-21 | 1993-07-22 | Sunds Defibrator Industries Aktiebolag | Bleaching of chemical pulp |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1100709A (en) * | 1965-06-25 | 1968-01-24 | Pulp Paper Res Inst | Two-stage purification of fibrous cellulose material |
| EP0402335B2 (en) * | 1989-06-06 | 2001-03-14 | Eka Chemicals AB | Process for bleaching lignocellulose-containing pulps |
| SE500616C2 (en) * | 1993-06-08 | 1994-07-25 | Kvaerner Pulping Tech | Bleaching of chemical pulp with peroxide at overpressure |
| SE502706E (en) * | 1994-04-05 | 1999-09-27 | Mo Och Domsjoe Ab | Preparation of bleached cellulose pulp by bleaching with chlorine dioxide and treatment of complexing agents in the same step |
-
1994
- 1994-08-31 SE SE9402885A patent/SE514697C2/en not_active IP Right Cessation
-
1995
- 1995-08-11 US US08/793,509 patent/US6540872B1/en not_active Expired - Fee Related
- 1995-08-11 CA CA002197771A patent/CA2197771A1/en not_active Abandoned
- 1995-08-11 JP JP8508659A patent/JPH10505639A/en not_active Withdrawn
- 1995-08-11 NZ NZ292288A patent/NZ292288A/en unknown
- 1995-08-11 WO PCT/SE1995/000920 patent/WO1996006976A1/en not_active Application Discontinuation
- 1995-08-11 DE DE69528660T patent/DE69528660T2/en not_active Revoked
- 1995-08-11 EP EP95930753A patent/EP0778909B1/en not_active Revoked
- 1995-08-11 BR BR9508653A patent/BR9508653A/en not_active IP Right Cessation
- 1995-08-11 AT AT95930753T patent/ATE226658T1/en not_active IP Right Cessation
- 1995-08-11 PT PT95930753T patent/PT778909E/en unknown
- 1995-08-11 CN CN95194782A patent/CN1065578C/en not_active Expired - Fee Related
- 1995-08-11 ES ES95930753T patent/ES2185715T3/en not_active Expired - Lifetime
- 1995-08-11 AU AU34017/95A patent/AU687626B2/en not_active Ceased
- 1995-08-23 ZA ZA957070A patent/ZA957070B/en unknown
-
1997
- 1997-02-27 FI FI970821A patent/FI970821A0/en not_active Application Discontinuation
- 1997-02-27 NO NO970907A patent/NO970907D0/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2219504B1 (en) * | 1972-04-21 | 1974-02-28 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt | MULTI-STAGE BLEACHING OF PULP WITH SIGNIFICANTLY REDUCED CHLORINE USE |
| US5091054A (en) * | 1989-08-18 | 1992-02-25 | Degussa Corporation | Process for bleaching and delignification of lignocellulosic |
| WO1991011554A1 (en) * | 1990-01-31 | 1991-08-08 | Eka Nobel Ab | Process for bleaching of ligno-cellulosic material |
| WO1993014262A1 (en) * | 1992-01-21 | 1993-07-22 | Sunds Defibrator Industries Aktiebolag | Bleaching of chemical pulp |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69528660D1 (en) | 2002-11-28 |
| US6540872B1 (en) | 2003-04-01 |
| PT778909E (en) | 2003-01-31 |
| JPH10505639A (en) | 1998-06-02 |
| ZA957070B (en) | 1996-04-15 |
| NO970907L (en) | 1997-02-27 |
| EP0778909A1 (en) | 1997-06-18 |
| DE69528660T2 (en) | 2003-06-26 |
| ES2185715T3 (en) | 2003-05-01 |
| SE514697C2 (en) | 2001-04-02 |
| FI970821A (en) | 1997-02-27 |
| FI970821A0 (en) | 1997-02-27 |
| NZ292288A (en) | 1997-11-24 |
| AU687626B2 (en) | 1998-02-26 |
| NO970907D0 (en) | 1997-02-27 |
| CN1157644A (en) | 1997-08-20 |
| SE9402885L (en) | 1996-03-01 |
| ATE226658T1 (en) | 2002-11-15 |
| WO1996006976A1 (en) | 1996-03-07 |
| BR9508653A (en) | 1997-11-11 |
| AU3401795A (en) | 1996-03-22 |
| EP0778909B1 (en) | 2002-10-23 |
| SE9402885D0 (en) | 1994-08-31 |
| CA2197771A1 (en) | 1996-03-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| FG4A | Grant of patent | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |